The Smartwool Men's Merino 250 Baselayer 3/4 Bottom is a short length base layer that will keep you warm without bulking up your ski boots. Also comfortable when hiking or running, or when wearing any other tall boot that requires tall socks. Less bulk in the boot, more comfort throughout the adventure. The 100%; Merino wool fabric is soft next to skin, regulates temperature and even resists odors. Sounds like a win from ski hill to Climbing adventure and beyond. Features of the Smartwool Men's Classic Thermal Merino Base Layer 3/4 Bottom Interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance Fit updated to improve functionality while enhancing aesthetics Merino-covered elastic waistband and traditional fly design Flatlock seam construction designed to minimize chafing Fabric Details 100% Merino Wool